x86: hyperv_stimer: add direct mode tests
All tests but stimer_test_one_shot_busy() are applicable, make them run in
both 'message' and 'direct' modes.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
diff --git a/x86/hyperv.h b/x86/hyperv.h
index 2fc70e5..a144384 100644
--- a/x86/hyperv.h
+++ b/x86/hyperv.h
@@ -10,6 +10,8 @@
#define HV_X64_MSR_SYNIC_AVAILABLE (1 << 2)
#define HV_X64_MSR_SYNTIMER_AVAILABLE (1 << 3)
+#define HV_STIMER_DIRECT_MODE_AVAILABLE (1 << 19)
+
#define HV_X64_MSR_GUEST_OS_ID 0x40000000
#define HV_X64_MSR_HYPERCALL 0x40000001
@@ -205,6 +207,11 @@
return cpuid(HYPERV_CPUID_FEATURES).a & HV_X64_MSR_SYNTIMER_AVAILABLE;
}
+static inline bool stimer_direct_supported(void)
+{
+ return cpuid(HYPERV_CPUID_FEATURES).d & HV_STIMER_DIRECT_MODE_AVAILABLE;
+}
+
static inline bool hv_time_ref_counter_supported(void)
{
return cpuid(HYPERV_CPUID_FEATURES).a & HV_X64_MSR_TIME_REF_COUNT_AVAILABLE;
diff --git a/x86/hyperv_stimer.c b/x86/hyperv_stimer.c
index 0b9ec7a..e50903b 100644
--- a/x86/hyperv_stimer.c
+++ b/x86/hyperv_stimer.c
@@ -16,6 +16,9 @@
#define SINT1_VEC 0xF1
#define SINT2_VEC 0xF2
+#define APIC_VEC1 0xF3
+#define APIC_VEC2 0xF4
+
#define SINT1_NUM 2
#define SINT2_NUM 3
#define ONE_MS_IN_100NS 10000
@@ -25,6 +28,8 @@
struct stimer {
int sint;
int index;
+ bool direct;
+ int apic_vec;
atomic_t fire_count;
};
@@ -81,8 +86,7 @@
wrmsr(HV_X64_MSR_STIMER0_CONFIG + 2*timer->index, 0);
}
-static void process_stimer_expired(struct svcpu *svcpu, struct stimer *timer,
- u64 expiration_time, u64 delivery_time)
+static void process_stimer_expired(struct stimer *timer)
{
atomic_inc(&timer->fire_count);
}
@@ -119,8 +123,14 @@
abort();
}
timer = &svcpu->timer[payload->timer_index];
- process_stimer_expired(svcpu, timer, payload->expiration_time,
- payload->delivery_time);
+
+ if (timer->direct) {
+ report(false, "VMBus message in direct mode received");
+ report_summary();
+ abort();
+ }
+
+ process_stimer_expired(timer);
msg->header.message_type = HVMSG_NONE;
mb();
@@ -159,6 +169,32 @@
__stimer_isr(vcpu);
}
+static void __stimer_isr_direct(int vcpu, int timer_index)
+{
+ struct svcpu *svcpu = &g_synic_vcpu[vcpu];
+ struct stimer *timer = &svcpu->timer[timer_index];
+
+ process_stimer_expired(timer);
+}
+
+static void stimer_isr_direct1(isr_regs_t *regs)
+{
+ int vcpu = smp_id();
+
+ __stimer_isr_direct(vcpu, 0);
+
+ eoi();
+}
+
+static void stimer_isr_direct2(isr_regs_t *regs)
+{
+ int vcpu = smp_id();
+
+ __stimer_isr_direct(vcpu, 1);
+
+ eoi();
+}
+
static void stimer_start(struct stimer *timer,
bool auto_enable, bool periodic,
u64 tick_100ns)
@@ -171,7 +207,12 @@
config.periodic = periodic;
config.enable = 1;
config.auto_enable = auto_enable;
- config.sintx = timer->sint;
+ if (!timer->direct) {
+ config.sintx = timer->sint;
+ } else {
+ config.direct_mode = 1;
+ config.apic_vector = timer->apic_vec;
+ }
if (periodic) {
count = tick_100ns;
@@ -229,6 +270,28 @@
timer2->sint = SINT2_NUM;
}
+static void stimer_test_prepare_direct(void *ctx)
+{
+ int vcpu = smp_id();
+ struct svcpu *svcpu = &g_synic_vcpu[vcpu];
+ struct stimer *timer1, *timer2;
+
+ write_cr3((ulong)ctx);
+
+ timer1 = &svcpu->timer[0];
+ timer2 = &svcpu->timer[1];
+
+ stimer_init(timer1, 0);
+ stimer_init(timer2, 1);
+
+ timer1->apic_vec = APIC_VEC1;
+ timer2->apic_vec = APIC_VEC2;
+
+ timer1->direct = true;
+ timer2->direct = true;
+}
+
+
static void stimer_test_periodic(int vcpu, struct stimer *timer1,
struct stimer *timer2)
{
@@ -279,8 +342,15 @@
static void stimer_test_one_shot_busy(int vcpu, struct stimer *timer)
{
- struct hv_message_page *msg_page = g_synic_vcpu[vcpu].msg_page;
- struct hv_message *msg = &msg_page->sint_message[timer->sint];
+ struct hv_message_page *msg_page;
+ struct hv_message *msg;
+
+ /* Skipping msg slot busy test in direct mode */
+ if (timer->direct)
+ return;
+
+ msg_page = g_synic_vcpu[vcpu].msg_page;
+ msg = &msg_page->sint_message[timer->sint];
msg->header.message_type = HVMSG_TIMER_EXPIRED;
wmb();
@@ -334,7 +404,12 @@
synic_disable();
}
-static void stimer_test_all(void)
+static void stimer_test_cleanup_direct(void *ctx)
+{
+ stimers_shutdown();
+}
+
+static void stimer_test_all(bool direct)
{
int ncpus;
@@ -346,16 +421,30 @@
report_abort("number cpus exceeds %d", MAX_CPUS);
printf("cpus = %d\n", ncpus);
- handle_irq(SINT1_VEC, stimer_isr);
- handle_irq(SINT2_VEC, stimer_isr_auto_eoi);
+ if (!direct) {
+ printf("Starting Hyper-V SynIC timers tests: message mode\n");
- on_cpus(stimer_test_prepare, (void *)read_cr3());
- on_cpus(stimer_test, NULL);
- on_cpus(stimer_test_cleanup, NULL);
+ handle_irq(SINT1_VEC, stimer_isr);
+ handle_irq(SINT2_VEC, stimer_isr_auto_eoi);
+
+ on_cpus(stimer_test_prepare, (void *)read_cr3());
+ on_cpus(stimer_test, NULL);
+ on_cpus(stimer_test_cleanup, NULL);
+ } else {
+ printf("Starting Hyper-V SynIC timers tests: direct mode\n");
+
+ handle_irq(APIC_VEC1, stimer_isr_direct1);
+ handle_irq(APIC_VEC2, stimer_isr_direct2);
+
+ on_cpus(stimer_test_prepare_direct, (void *)read_cr3());
+ on_cpus(stimer_test, NULL);
+ on_cpus(stimer_test_cleanup_direct, NULL);
+ }
}
-int main(int ac, char **av)
+int main(int argc, char **argv)
{
+ bool direct = argc >= 2 && !strcmp(argv[1], "direct");
if (!hv_synic_supported()) {
report_skip("Hyper-V SynIC is not supported");
@@ -372,7 +461,11 @@
goto done;
}
- stimer_test_all();
+ if (direct && !stimer_direct_supported()) {
+ report_skip("Hyper-V SinIC timer direct mode is not supported");
+ }
+
+ stimer_test_all(direct);
done:
return report_summary();
}
diff --git a/x86/unittests.cfg b/x86/unittests.cfg
index 06164ae..124be7a 100644
--- a/x86/unittests.cfg
+++ b/x86/unittests.cfg
@@ -466,6 +466,12 @@
extra_params = -cpu host,hv_passthrough
groups = hyperv
+[hyperv_stimer_direct]
+file = hyperv_stimer.flat
+smp = 2
+extra_params = -cpu host,hv_passthrough -append direct
+groups = hyperv
+
[hyperv_clock]
file = hyperv_clock.flat
smp = 2
